BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 6.1.0-syzkaller-03225-g764822972d64 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 tfrc_rx_hist_sample_rtt+0x4d2/0x4e0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x607/0xf50 net/dccp/ccids/ccid3.c:760
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xe1/0x260 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x10b/0x160 net/dccp/input.c:364
 dccp_v4_do_rcv+0x168/0x1a0 net/dccp/ipv4.c:674
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __sk_receive_skb+0x298/0x820 net/core/sock.c:565
 dccp_v4_rcv+0xfbf/0x18e0 net/dccp/ipv4.c:897
 ip_protocol_deliver_rcu+0x9f/0x7c0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2ec/0x4c0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip_local_deliver+0x1ae/0x200 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:455 [inline]
 ip_rcv_finish+0x1cf/0x2f0 net/ipv4/ip_input.c:449
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip_rcv+0xae/0xd0 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5489
 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5603
 process_backlog+0x3e4/0x810 net/core/dev.c:5931
 __napi_poll+0xb8/0x770 net/core/dev.c:6498
 napi_poll net/core/dev.c:6565 [inline]
 net_rx_action+0xa00/0xde0 net/core/dev.c:6676
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571
 run_ksoftirqd kernel/softirq.c:934 [inline]
 run_ksoftirqd+0x31/0x60 kernel/softirq.c:926
 smpboot_thread_fn+0x659/0xa20 kernel/smpboot.c:164
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 3858 Comm: syz-executor.3 Not tainted 6.1.0-syzkaller-03225-g764822972d64 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 tfrc_rx_hist_sample_rtt+0x4d2/0x4e0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x607/0xf50 net/dccp/ccids/ccid3.c:760
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xe1/0x260 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x10b/0x160 net/dccp/input.c:364
 dccp_v4_do_rcv+0x168/0x1a0 net/dccp/ipv4.c:674
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __sk_receive_skb+0x298/0x820 net/core/sock.c:565
 dccp_v4_rcv+0xfbf/0x18e0 net/dccp/ipv4.c:897
 ip_protocol_deliver_rcu+0x9f/0x7c0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2ec/0x4c0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip_local_deliver+0x1ae/0x200 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:455 [inline]
 ip_rcv_finish+0x1cf/0x2f0 net/ipv4/ip_input.c:449
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip_rcv+0xae/0xd0 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5489
 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5603
 process_backlog+0x3e4/0x810 net/core/dev.c:5931
 __napi_poll+0xb8/0x770 net/core/dev.c:6498
 napi_poll net/core/dev.c:6565 [inline]
 net_rx_action+0xa00/0xde0 net/core/dev.c:6676
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571
 do_softirq.part.0+0xde/0x130 kernel/softirq.c:472
 </IRQ>
 <TASK>
 do_softirq kernel/softirq.c:464 [inline]
 __local_bh_enable_ip+0x106/0x130 kernel/softirq.c:396
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:822 [inline]
 ip_finish_output2+0x7dc/0x2180 net/ipv4/ip_output.c:229
 __ip_finish_output net/ipv4/ip_output.c:306 [inline]
 __ip_finish_output+0x396/0x650 net/ipv4/ip_output.c:288
 ip_finish_output+0x31/0x280 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip_output+0x1a3/0x320 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:445 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0x8e2/0x1bf0 net/ipv4/ip_output.c:532
 dccp_transmit_skb+0xcfe/0x1450 net/dccp/output.c:138
 dccp_xmit_packet+0x270/0x750 net/dccp/output.c:281
 dccp_write_xmit+0x171/0x1d0 net/dccp/output.c:366
 dccp_sendmsg+0xaee/0xd30 net/dccp/proto.c:782
 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:827
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f168e68c0d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f168f4ba168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f168e7abf80 RCX: 00007f168e68c0d9
RDX: 0000000000040000 RSI: 0000000020000400 RDI: 0000000000000005
RBP: 00007f168e6e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd50ddb7cf R14: 00007f168f4ba300 R15: 0000000000022000
 </TASK>